In 1972 he published a book studying the legal aspects of 9 months war in the then East Pakistan (present day Bangladesh).
[4] According to Professor Richard Lillich, the Paris Minimum Standards of Human Rights Norms in a State of Emergency adopted by the International Law Association in 1984 were originally Chowdhury's idea.
As Chairman of the sub-committee, Chowdhury expands on the Paris Minimum Standards by detailed analysis of state practice and the work of international monitoring bodies.
The first section of the book sets forth and analyzes the minimum standards that should be observed with respect to the declaration, duration and control of a national state of emergency.
The third section sets forth and describes the non-derogable rights and freedoms that may not be suspended or limited even during a state of emergency.